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ICS844021BGI-01T Datasheet(PDF) 1 Page - Integrated Device Technology |
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ICS844021BGI-01T Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 13 page FEMTOCLOCKS™ CRYSTAL-TO-LVDS CLOCK GENERATOR ICS844021I-01 IDT™ / ICS™ LVDS CLOCK GENERATOR 1 ICS844021BGI-01 REV. C SEPTEMBER 27, 2007 PRELIMINARY GENERAL DESCRIPTION The ICS844021I-01 is an Ethernet Clock Generator and a member of the HiPerClocksTM family of high performance devices from IDT. The ICS844021I- 01 uses an 18pF parallel resonant crystal over the range of 24.5MHz – 34MHz. For Ethernet appli- cations, a 25MHz crystal is used. The ICS844021I-01 has excellent <1ps phase jitter performance, over the 1.875MHz – 20MHz integration range. The ICS844021I-01 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. FEATURES • One Differential LVDS output • Crystal oscillator interface, 18pF parallel resonant crystal (24.5MHz – 34MHz) • Output frequency range: 122.5MHz – 170MHz • VCO range: 490MHz – 680MHz • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.32ps (typical) @ 3.3V • 3.3V or 2.5V operating supply • -40°C to 85°C ambient operating temperature • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages HiPerClockS™ ICS ICS844021I-01 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View VDDA GND XTAL_OUT XTAL_IN 1 2 3 4 VDD Q nQ OE 8 7 6 5 BLOCK DIAGRAM OSC Phase Detector VCO 490MHz - 680MHz M = ÷20 (fixed) N = ÷4 (fixed) XTAL_IN XTAL_OUT OE Q nQ Pullup COMMON CONFIGURATION TABLE - Gb ETHERNET PIN ASSIGNMENT s t u p n I y c n e u q e r F t u p t u O ) z H M ( ) z H M ( y c n e u q e r F l a t s y r CM N n o i t a c i l p i t l u M N / M e u l a V 5 20 24 5 5 2 1 6 6 6 . 6 20 24 5 3 3 . 3 3 1 3 3 . 3 30 24 5 6 6 . 6 6 1 The Preliminary Information presented herein represents a product in pre-production. The noted characteristics are based on initial product characterization and/or qualification. Integrated Device Technology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice. |
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